spice examples - rit - peoplepeople.rit.edu/lffeee/spice_examples.pdf · text input files dc,...
TRANSCRIPT
![Page 1: SPICE Examples - RIT - Peoplepeople.rit.edu/lffeee/SPICE_Examples.pdf · Text Input Files DC, Transient, AC Analysis LC Filter Inverters, ... TRANSIENT ANALYSIS USING LTSPICE](https://reader030.vdocument.in/reader030/viewer/2022021419/5acb677f7f8b9ad13e8b876b/html5/thumbnails/1.jpg)
© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 1
Rochester Institute of Technology
Microelectronic Engineering
ROCHESTER INSTITUTE OF TECHNOLOGY
MICROELECTRONIC ENGINEERING
SPICE Examples
Dr. Lynn Fuller Electrical and Microelectronic Engineering
Rochester Institute of Technology 82 Lomb Memorial Drive Rochester, NY 14623-5604
Tel (585) 475-2035 Fax (585) 475-5041
Dr. Fuller’s Webpage: http://people.rit.edu/lffeee Email: [email protected]
Dept Webpage: http://www.microe.rit.edu
1-2-2014 SPICE_Examples.ppt
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 2
Rochester Institute of Technology
Microelectronic Engineering
ADOBE PRESENTER
This PowerPoint module has been published using Adobe Presenter. Please click
on the Notes tab in the left panel to read the instructors comments for each slide.
Manually advance the slide by clicking on the play arrow or pressing the page
down key.
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 3
Rochester Institute of Technology
Microelectronic Engineering
OUTLINE
Introduction Text Input Files DC, Transient, AC Analysis LC Filter Inverters, NMOS, PMOS, CMOS Rise Time, Fall Time, Gate Delay Ring Oscillator Combinatorial Logic, NOR, 4 to 1 MUX Inverter with Hysteresis Oscillators 2 Phase Non Overlapping Clocks Analog Switch Op Amps, CMOS, BJT Waveform Generator Operational Transconductance Amplifier (OTA) AM Receiver References Homework
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 4
Rochester Institute of Technology
Microelectronic Engineering
INTRODUCTION
SPICE (Simulation Program for Integrated Circuit Engineering) is a general-purpose circuit simulation program for non-linear DC, non-linear transient, and linear AC analysis. Circuits may contain resistors, capacitors, inductors, mutual inductors, independent voltage and current sources, four types of dependent sources, transmission lines, switches, and several semiconductor devices: including diodes, BJTs, JFETs, MESFETs, and MOSFETs. Circuits with large numbers of all types of components can be simulated. SPICE input files and output files are simple text files (e.g. name.txt) Input files include a TITLE, circuit description NET LIST, analysis directives (COMMANDS), and lists of other text files to include (INC) such as model libraries (LIB) and an END command.
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 5
Rochester Institute of Technology
Microelectronic Engineering
INTRODUCTION
PSpice Lite 9.2 is one of the OrCAD family of products, from Cadence Design Systems, Inc., offering a complete suite of electronic design tools. It is free and includes limited versions of OrCAD Capture, for schematic capture, PSpice for analog circuit simulation and Pspice A/D for mixed analog and digital circuit simulation. PSpice Lite 9.2 is limited to 64 nodes, 10 transistors, two operational amplifiers and 65 primitive digital devices. See page 35 (xxxv) of the PSpice Users Guide. LT SPICE – is a free SPICE simulator with schematic capture from Linear Technology. It is quite similar to PSpice Lite but is not limited in the number of devices or nodes. Linear Technology (LT) is one of the industry leaders in analog and digital integrated circuits. Linear Technology provides a complete set of SPICE models for LT components.
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 6
Rochester Institute of Technology
Microelectronic Engineering
CREATING THE INPUT FILE
The input file can be generated from a schematic capture program, or just typed in a text editor such as “Notepad” or “WordPad” *Simple Resistor Divider R1 1 0 2K R2 2 1 3K V1 2 0 DC 5 .DC V1 0 5 .1 .END
0
5V
V1
R2
3K
R1
2K
2 1
+ -
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 7
Rochester Institute of Technology
Microelectronic Engineering
LTSPICE USING INPUT FILE INSTEAD OF SCHEMATIC
This is a text file located at C:\SPICE\SimpleExample.txt
.op is a spice directive to do DC operating point analysis
Resulting Plot
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 8
Rochester Institute of Technology
Microelectronic Engineering
RC DIVIDER CIRCUIT
0
3V
R1
20K
VC
+
-
R2
10K
Calculate VC as the voltage V1
is swept from 0 to 3 volts
Change the V1 to a 3 volt pulse
function and plot VC versus
time.
Change the voltage V1 to an
AC voltage source and plot VC
versus frequency
V1 + - 1 uF
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 9
Rochester Institute of Technology
Microelectronic Engineering
DC SPICE ANALYSIS USING LTSPICE
This net list is automatically generated from the schematic
N002
N001
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 10
Rochester Institute of Technology
Microelectronic Engineering
TRANSIENT ANALYSIS USING LTSPICE
Right click on voltage source to get this dialog box
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
AC ANALYSIS USING LTSPICE
Right click on voltage source to get this dialog box
Phase
Magnitude
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 12
Rochester Institute of Technology
Microelectronic Engineering
LC FILTER
f0 = 1
2 LC
Phase
Magnitude
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 13
Rochester Institute of Technology
Microelectronic Engineering
NMOS INVERTER WITH RESISTER LOAD
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 14
Rochester Institute of Technology
Microelectronic Engineering
NMOS INVERTER RESISTIVE LOADS
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 15
Rochester Institute of Technology
Microelectronic Engineering
NMOS INVERTER WITH NMOS LOAD
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
PMOS INVERTER WITH PMOS LOAD
INVERTER USING RIT PMOSFET, Dr. Lynn Fuller, 2-11-2007
*LINE ABOVE IS TITLE
*
*START WIN SPICE AND ENTER LOCATION AND NAME OF INPUT FILE
*THIS FILE IS PMOS_INVERTER.TXT
*EXAMPLE: winspice> source c:/spice/PMOS_INVERTER.txt
*
*THE TRANSISTOR MODELS ARE IN THE FILE NAMED BELOW
.INCLUDE E:\SPICE\WINSPICE\RIT_MICROE_MODELS.TXT
*
*CIRCUIT DESCRIPTION
*
*VOLTAGE SOURCES
V1 1 0 DC -10
V2 2 0 DC 0
*
*TRANSISTORS
M1 7 2 0 0 RITPMOS49 L=20U W=60U
M2 1 1 7 0 RITPMOS49 L=60U W=20U
*
*REQUESTED ANALYSIS
.OP
.DC V2 0 -10 -0.1
.PLOT DC V(7)
*
.END
Gain=1
Gain=2 Gain=3
1
2
V2=0 to -10
+
-
V1=-10
+
-
M1
Wu/Lu
7
Wd/Ld
Gain = Wd/Ld
Wu/Lu
0.5
M2
0
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 17
Rochester Institute of Technology
Microelectronic Engineering
CMOS INVERTER VOUT VS VIN (VTC)
VIN VOUT
VIN
CMOS
+V
VO
Idd
+V 0
0
+V
ViL
Voh
VoL
Vih
Imax
VOUT
VIN
Idd
0 noise margin=ViL-VoL 1 noise margin=VoH-ViH
Slope = Gain
Vinv
PMOS
NMOS
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 18
Rochester Institute of Technology
Microelectronic Engineering
MEASURED CMOS INVERTER VOUT & I VS VIN
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 19
Rochester Institute of Technology
Microelectronic Engineering
DC SIMULATION OF INVERTER VOUT & I VS VIN
What happens to the voltage transfer curve (VTC) and noise margins when one of the threshold voltages is changed by 0.3 volts? What happens when width of transistors is changed.
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 20
Rochester Institute of Technology
Microelectronic Engineering
SIMPLE AND ADVANCED SPICE MODEL
* From Electronics II EEEE482 FOR ~100nm Technology .model EECMOSN NMOS (LEVEL=8 +VERSION=3.1 CAPMOD=2 MOBMOD=1 +TOX=5E-9 XJ=1.84E-7 NCH=1E17 NSUB=5E16 XT=5E-8 +VTH0=0.4 U0= 200 WINT=1E-8 LINT=1E-8 +NGATE=5E20 RSH=1000 JS=3.23E-8 JSW=3.23E-8 CJ=6.8E-4 MJ=0.5 PB=0.95 +CJSW=1.26E-10 MJSW=0.5 PBSW=0.95 PCLM=5 +CGSO=3.4E-10 CGDO=3.4E-10 CGBO=5.75E-10) * * From Electronics II EEEE482 FOR ~100nm Technology .model EECMOSP PMOS (LEVEL=8 +TOX=5E-9 XJ=0.05E-6 NCH=1E17 NSUB=5E16 XT=5E-8 +VTH0=-0.4 U0= 100 WINT=1E-8 LINT=1E-8 +NGATE=5E20 RSH=1000 JS=3.51E-8 JSW=3.51E-8 CJ=5.28E-4 MJ=0.5 PB=0.94 +CJSW=1.19E-10 MJSW=0.5 PBSW=0.94 PCLM=5 +CGSO=4.5E-10 CGDO=4.5E-10 CGBO=5.75E-10) * * From Electronics II EEEE482 SIMPLE MODEL .model EENMOS NMOS (VTO=0.4 KP=432E-6 GAMMA=0.2 PHI=.88) * * From Electronics II EEEE482 SIMPLE MODEL .model EEPMOS PMOS (VTO=-0.4 KP=122E-6 GAMMA=0.2 PHI=.88)
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
CMOS INVERTER WITH LEVEL 1 SPICE MODEL
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 22
Rochester Institute of Technology
Microelectronic Engineering
CMOS INVERTER WITH LEVEL 8 SPICE MODEL
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
SPICE LEVEL-1 MOSFET MODEL
p+ p+
CBD
S
G
D
CBS
RS RD
CGDO
ID
CGBO
COX
CGSO
B
where ID is a dependent current source using simple long channel equations.
![Page 24: SPICE Examples - RIT - Peoplepeople.rit.edu/lffeee/SPICE_Examples.pdf · Text Input Files DC, Transient, AC Analysis LC Filter Inverters, ... TRANSIENT ANALYSIS USING LTSPICE](https://reader030.vdocument.in/reader030/viewer/2022021419/5acb677f7f8b9ad13e8b876b/html5/thumbnails/24.jpg)
© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 24
Rochester Institute of Technology
Microelectronic Engineering
AC MODEL FOR MOSFETS
The SPICE model parameters that effect the AC response of a MOSFET are the resistance and capacitance parameters shown here: RS,RS Source/Drain Series Resistance, ohms RSH Sheet Resistance of Drain/Source, ohms CGSO,CGDO Zero Bias Gate-Source/Drain Capacitance, F/m of width CGBO Zero Bias Gate-Substrate Capacitance, F/m of length CJ DS Bottom Junction Capacitance, F/m2 CJSW DS Side Wall Junction Capacitance, F/m of perimeter MJ Junction Grading Coefficient, 0.5 MJSW Side Wall Grading Coefficient, 0.5 These are combined with the transistors properties to obtain the internal resistance and capacitance values for each transistor. L, W Length and Width AS,AD Area of the Source/Drain PS,PD Perimeter of the Source/Drain NRS,NRD Number of squares Contact to Channel
![Page 25: SPICE Examples - RIT - Peoplepeople.rit.edu/lffeee/SPICE_Examples.pdf · Text Input Files DC, Transient, AC Analysis LC Filter Inverters, ... TRANSIENT ANALYSIS USING LTSPICE](https://reader030.vdocument.in/reader030/viewer/2022021419/5acb677f7f8b9ad13e8b876b/html5/thumbnails/25.jpg)
© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
INVERTER LAYOUT
INV/NOR4
W = 40 µm Ldrawn = 2.5µm Lpoly = 1.5µm Leff = 1.0 µm\ Pd=680p Ad=114u
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
FIND DIMENSIONS OF THE TRANSISTORS
NMOS PMOS
L 1.5u 1.5u
W 40u 40u
AD 17ux40u=680p 17ux40u=680p
AS 17ux40u=680p 17ux40u=680p
PD 2x(17u+40u)=114u 2x(17u+40u)=114u
PS 2x(17u+40u)=114u 2x(17u+40u)=114u
Right mouse click on each transistor and add these values to the properties.
Inverter
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
RISE TIME AND FALL TIME LTSPICE SIMULATION
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
SIMULATION OF GATE DELAY IN SINGLE INVERTER
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
RING OSCILLATOR, td, THEORY
td = T / 2 N td = gate delay N = number of stages T = period of oscillation
Vout
Seven stage ring oscillator with two output buffers
T = period of oscillation
Vout
Buffer
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© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
MEASURED RING OSCILLATOR OUTPUT
73 Stage Ring at 5V
td = 104.8ns / 2(73) = 0.718 ns
![Page 31: SPICE Examples - RIT - Peoplepeople.rit.edu/lffeee/SPICE_Examples.pdf · Text Input Files DC, Transient, AC Analysis LC Filter Inverters, ... TRANSIENT ANALYSIS USING LTSPICE](https://reader030.vdocument.in/reader030/viewer/2022021419/5acb677f7f8b9ad13e8b876b/html5/thumbnails/31.jpg)
© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
SPICE LEVEL-1 MOSFET MODEL
p+ p+
CBD
S
G
D
CBS
RS RD
CGDO
ID
CGBO
COX
CGSO
B
where ID is a dependent current source using simple long channel equations.
![Page 32: SPICE Examples - RIT - Peoplepeople.rit.edu/lffeee/SPICE_Examples.pdf · Text Input Files DC, Transient, AC Analysis LC Filter Inverters, ... TRANSIENT ANALYSIS USING LTSPICE](https://reader030.vdocument.in/reader030/viewer/2022021419/5acb677f7f8b9ad13e8b876b/html5/thumbnails/32.jpg)
© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
Page 32
Rochester Institute of Technology
Microelectronic Engineering
AC MODEL FOR MOSFETS
The SPICE model parameters that effect the AC response of a MOSFET are the resistance and capacitance parameters shown here: RS,RS Source/Drain Series Resistance, ohms RSH Sheet Resistance of Drain/Source, ohms CGSO,CGDO Zero Bias Gate-Source/Drain Capacitance, F/m of width CGBO Zero Bias Gate-Substrate Capacitance, F/m of length CJ DS Bottom Junction Capacitance, F/m2 CJSW DS Side Wall Junction Capacitance, F/m of perimeter MJ Junction Grading Coefficient, 0.5 MJSW Side Wall Grading Coefficient, 0.5 These are combined with the transistors properties to obtain the internal resistance and capacitance values for each transistor. L, W Length and Width AS,AD Area of the Source/Drain PS,PD Perimeter of the Source/Drain NRS,NRD Number of squares Contact to Channel
![Page 33: SPICE Examples - RIT - Peoplepeople.rit.edu/lffeee/SPICE_Examples.pdf · Text Input Files DC, Transient, AC Analysis LC Filter Inverters, ... TRANSIENT ANALYSIS USING LTSPICE](https://reader030.vdocument.in/reader030/viewer/2022021419/5acb677f7f8b9ad13e8b876b/html5/thumbnails/33.jpg)
© January 2, 2014 Dr. Lynn Fuller
SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
RING OSCILLATOR LAYOUTS
17 Stage Un-buffered Output
L/W 8/16 4/16 2/16
L/W=2/30 Buffered Output
73 Stage 37 Stage
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SPICE Examples
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Microelectronic Engineering
MOSFETS IN THE INVERTER OF 73 RING OSCILLATOR
nmosfet pmosfet
73 Stage Ring Oscillator
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SPICE Examples
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Microelectronic Engineering
FIND DIMENSIONS OF THE TRANSISTORS
NMOS PMOS
L 2u 2u
W 12u 30u
AD 12ux12u=144p 12ux30u=360p
AS 12ux12u=144p 12ux30u=360p
PD 2x(12u+12u)=48u 2x(12u+30u)=84u
PS 2x(12u+12u)=48u 2x(12u+30u)=84u
NRS 1 0.3
NRD 1 0.3
Right mouse click on each transistor and add these values to the properties.
73 Stage
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SPICE Examples
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LEVEL = 7
*2-15-2009
.MODEL RITSUBN7 NMOS (LEVEL=7
+VERSION=3.1 CAPMOD=2 MOBMOD=1
+TOX=1.5E-8 XJ=1.84E-7 NCH=1.45E17 NSUB=5.33E16 XT=8.66E-8 NSS=3E11
+VTH0=1.0 U0= 600 WINT=2.0E-7 LINT=1E-7
+NGATE=5E20 RSH=50 JS=3.23E-8 JSW=3.23E-8 CJ=6.8E-4 MJ=0.5 PB=0.95
+CJSW=1.26E-10 MJSW=0.5 PBSW=0.95 PCLM=5
+CGSO=3.4E-10 CGDO=3.4E-10 CGBO=5.75E-10)
*
*2-17-2009
.MODEL RITSUBP7 PMOS (LEVEL=7
+VERSION=3.1 CAPMOD=2 MOBMOD=1
+TOX=1.5E-8 XJ=2.26E-7 NCH=7.12E16 NSUB=3.16E16 XT=8.66E-8 NSS=3E11 PCLM=5
+VTH0=-1.0 U0= 376.72 WINT=2.0E-7 LINT=2.26E-7 NGATE=5E20
+RSH=50 JS=3.51E-8 JSW=3.51E-8 CJ=5.28E-4 MJ=0.5 PB=0.94
+CJSW=1.19E-10 MJSW=0.5 PBSW=0.94
+CGSO=4.5E-10 CGDO=4.5E-10 CGBO=5.75E-10)
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SPICE Examples
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Microelectronic Engineering
SIMULATED OUTPUT AT 10 VOLTS
Three Stage Ring Oscillator with Transistor Parameters for 73 Stage Ring Oscillator and Supply of 10 volts
td = T / 2N = 3.5nsec / 2 / 3
td = 0.583 nsec
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SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
SIMULATED OUTPUT AT 5 VOLTS
Three Stage Ring Oscillator with Transistor Parameters for 73 Stage Ring Oscillator and Supply of 5 volts
td = T / 2N = 5.5nsec / 2 / 3
td = 0.92 nsec Measured td = 0.718 nsec @ 5 V
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SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
RING OSCILLATOR USING LTSPICE
td = T / 2N
= 6.4nsec / 2 / 3
= 1.07 nsec
Measured td = 0.718 nsec @ 5 V
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SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
CONCLUSION
Since the measured and the simulated gate delays, td are close to correct, then the SPICE model must be close to correct. The inverter gate delay depends on the values of the internal capacitors and resistances of the transistor. Specifically: RS, RS, RSH CGSO, CGDO, CGBO CJ, CJSW These are combined with the transistors L, W Length and Width AS,AD Area of the Source/Drain PS,PD Perimeter of the Source/Drain NRS,NRD Number of squares Contact to Channel
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SPICE Examples
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Microelectronic Engineering
VTC FOR THREE INPUT NAND GATE
+V
Vout Va
Vb
Vc
TRUTH TABLE
Vout Vb
0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 0
Va Vc
M3 has Vt = Vto M1 has Vt = Vto + Body Effect Thus the Voltage Transfer Curve (VTC) is different depending on which transistor is going from low to high (with other two high)
M1
M2
M3
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SPICE Examples
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Microelectronic Engineering
3-INPUT NAND- BODY EFFECT
Two inputs high Sweep M6 Body Effect Two inputs high
Sweep M7 No Body Effect
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SPICE Examples
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Microelectronic Engineering
GATE LEVEL SIMULATION OF XOR – ALL/NOR
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SPICE Examples
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Microelectronic Engineering
TRANSISTOR LEVEL SIMULATION OF XOR – ALL/NOR
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SPICE Examples
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4 TO 1 MULTIPLEXER
I0
I1
I2
I3
Output
A
B
A B Out
0 0 I0
0 1 I1
1 0 I2
1 1 I3
Digital signals A and B control which of the four inputs is directed to the output
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SPICE Examples
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Rochester Institute of Technology
Microelectronic Engineering
4 TO 1 MUX - GATE LEVEL SIMULATION
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Microelectronic Engineering
ANALOG SWITCH
Switch Off Switch On
Analog Input
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Microelectronic Engineering
BASIC TWO STAGE OPERATIONAL AMPLIFIER
Layout
Schematic
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SPICE Examples
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Microelectronic Engineering
SPICE ANALYSIS OF OP AMP
.incl rit_sub_param.txt m1 8 9 7 6 cmosn w=9u l=5u nrd=1 nrs=1 ad=45p pd=28u as=45p ps=28u m2 1 10 7 6 cmosn w=9u l=5u nrd=1 nrs=1 ad=45p pd=28u as=45p ps=28u m3 8 8 4 4 cmosp w=21u l=5u nrd=1 nrs=1 ad=102p pd=50u as=102p ps=50u m4 1 8 4 4 cmosp w=21u l=5u nrd=1 nrs=1 ad=102p pd=50u as=102p ps=50u m5 7 5 6 6 cmosn w=40u l=5u nrd=1 nrs=1 ad=205p pd=90u as=205p ps=90u m6 2 1 4 4 cmosp w=190u l=5u nrd=1 nrs=1 ad=950p pd=400u as=950p ps=400u m7 2 5 6 6 cmosn w=190u l=5u nrd=1 nrs=1 ad=950p pd=400u as=950p ps=400u m8 5 5 6 6 cmosn w=40u l=5u nrd=1 nrs=1 ad=205p pd=90u as=205p ps=90u vdd 4 0 3 vss 6 0 -3 cprobe 2 0 30p Rprobe 2 0 1meg cc 1 2 0.6p mr1 20 20 4 4 cmosp w=6u l=10u nrd=1 nrs=1 ad=200p pd=60u as=200p ps=60u mr2 5 5 20 4 cmosp w=6u l=10u nrd=1 nrs=1 ad=200p pd=60u as=200p ps=60u *************** *************
***dc open loop gain*********
vi1 9 0 0 vi2 10 0 0 *.dc vi2 -0.002 0.002 1u .dc vi2 -1 1 0.1m *****open loop frequency
characteristics***** *vi1 9 0 0 *vi2 10 0 dc 0 ac 1u *.ac dec 100 10 1g .end
13.5kV/V gain
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SPICE Examples
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Microelectronic Engineering
BASIC TWO STAGE OP AMP - LOADING
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SPICE Examples
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RIT OP AMP WITH OUTPUT STAGE – W/L
20/40 M7
M1 40/2
1
M6
W/L 100/2
6
M2
Vin+
99
40/2
Vin-
M5
W/L 100/2
3
+V +V
98
2
M4 90/2
M3 90/2
4 5
M14
90/2 M10 90/2
13
M13
30/2 30/2
M17
M20
M18
M8 M15
W/L 686/2
10
M19
W/L 3800/2
14
M11
12
M9
W/L
M16
W/L 336/2
7
RL
M12
9
11 8
W/L 282/2
W/L 100/2
W/L 2600/2
W/L 100/2
W/L 645/2
W/L 100/2
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RIT OP AMP WITH OUTPUT STAGE
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Microelectronic Engineering
RIT OP AMP WITH OUTPUT STAGE – RL=100
Voltage gain max ~4000
Current +/- 50mA
Offset voltage ~Zero
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OTHER RESULTS
Voltage Gain for 1 MEG Load Voltage Gain vs RL Output Resistance Gain versus Frequency (Gain Bandwidth Product) Lowest Supply Voltage Single Supply Operation Rail-to-Rail Operation Offset Voltage Effect of variation of Vt, temperture more
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Microelectronic Engineering
SIMPLE BJT OP AMP
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SPICE Examples
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Microelectronic Engineering
SIMPLE BJT OP AMP
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BJT OP AMP USE IN ELECTRONICS LAB
RC1
10 k
6 mA
–VEE = –12 V
vid
vo
Q2 Q1
100
VCC = +12 V
100
RC2
~
10 F
10 F RE2
RE1
RL
RC3
Q3
Q5
Q4 Q2N3904
Q2N3906
Q2N3906
100
100
Q6 Q2N3904
Q7 Q2N3906
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SPICE Examples
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Microelectronic Engineering
BJT OP AMP SPICE SIMULATION
Electronics II Lab Assignment
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SPICE Examples
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WAVEFORM GENERATOR
-
+ Vo3 Vo2
C
R -
+
Rf
Vo1
C
R
-
+
C
+V
-V
R2 R1
R
VT Rf
Vo1 – SQUARE WAVE Vo2 – TRIANGLE WAVE Vo3 – SINE WAVE (approximation)
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WAVEFORM GENERATOR
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AM RECEIVER
LC Filter Three Stage Amplifier Input 10’s of uV Output 100’s of mV
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Microelectronic Engineering
AM RECEIVER SIMULATION
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AM RECEIVER SIMULATION
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REFERENCES
1. MOSFET Modeling with SPICE, Daniel Foty, 1997, Prentice Hall, ISBN-0-13-227935-5 2. Operation and Modeling of the MOS Transistor, 2nd Edition, Yannis Tsividis,
1999, McGraw-Hill, ISBN-0-07-065523-5 3. UTMOST III Modeling Manual-Vol.1. Ch. 5. From Silvaco International. 4. ATHENA USERS Manual, From Silvaco International. 5. ATLAS USERS Manual, From Silvaco International. 6. Device Electronics for Integrated Circuits, Richard Muller and Theodore
Kamins, with Mansun Chan, 3rd Edition, John Wiley, 2003, ISBN 0-471-59398-2 7. ICCAP Manual, Hewlet Packard 8. PSpice Users Guide.
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HOMEWORK – SPICE EXAMPLES
Do SPICE for one of the following: 1. Do a SPICE simulation for one of the more complicated examples
shown in this document. 2. Do a SPICE simulation for a completely different circuit not shown
in this document.